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ID = 73415
United States of America (USA)
Brand: Cleartron Vacuum Tube; New York City, NY
Developer: Cleartron Vacuum Tube; New York City, NY 
Tube type:  Triode, vacuum   Power/Output 
Identical to CT101A

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Direct / Battery =

This is a very rare tube designed by the Cleartron company for resistance coupled amplifiers. It was known as the "Hi Constron" tube andwas claimed to be the first Hi-Mu tube offered for sale to the general public.

Information source - - Manufacturers Literature   Undated advertisement
CT101A: R.O.
Rudolf Osterkamp

CT101A: Fin Stewart
Fin Stewart

CT101A: Fin Stewart
Fin Stewart

from Just Qvigstad

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